<?xml version="1.0" encoding="UTF-8"?>
<dxl:DXLMessage xmlns:dxl="http://greenplum.com/dxl/2010/12/">
 <dxl:Comment><![CDATA[
Objective: Inserting from a replicated table into a hash table distributed by a
serial column should execute on a single segment and redistribute to other
segments. Serial column uses volatile function nextval() which produces a
tainted replicated distribution.

CREATE TABLE replicated_table(val1 VARCHAR, val2 VARCHAR) DISTRIBUTED REPLICATED;
INSERT INTO replicated_table SELECT random()::text AS val1, random()::text AS val2 FROM generate_series(1, 100);

CREATE TABLE distributed_table(_etl_id BIGSERIAL, val1 VARCHAR, val2 VARCHAR) DISTRIBUTED BY (_etl_id);

EXPLAIN (COSTS OFF) INSERT INTO distributed_table (val1, val2) SELECT val1, val2 FROM replicated_table;
                                  QUERY PLAN
------------------------------------------------------------------------------
 Insert on distributed_table
   ->  Result
         ->  Redistribute Motion 1:3  (slice1; segments: 1)
               Hash Key: (nextval('distributed_table__etl_id_seq'::regclass))
               ->  Seq Scan on replicated_table
 Optimizer: Pivotal Optimizer (GPORCA)
  ]]>
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